Transformer anchoring means



June 13, 1944.

v R. BOERINGER 2,351,097 TRANSFORMER ANCHORING MEANS Filed Feb. 25, 19422 Sheets-Sheet l INVENTOR R. BOERINGER BY A TT'ORNEY June 13, 1944. RBOERINGER 2,351,097

TRANSFORMER ANCHORING MEANS Filed Feb. 23, 1942 FIG.5

2 Sheets-Sheet 2 INVENTOR ER lNG ER ATTOR EEY Patented June 13, 1944UNITED STATES PATIENT OFFICE TRANSFORMER ANCHOR ING MEANS.Ralph"Bo'eringer, University City, Mo., assignor to Wagner ElectricCorporation, St. Louis, Mo., a corporation of Delaware i tpplicationFebruary 23, 1942, Serial No. 431,947

2: Claims. (01. 175-361) It has been found desirable to anchortransformers firmly in the cases or tanks in which they are contained.Heretofore this has usually been accomplished by angle irons bolted bothto the tank walls and to some part of the transformer, such as the clampplates or beams of the core. However, since the dimensions of both thetransformer and tank vary appreciably, particularly in transformers oflarge size, such bolting must be done through slots or oversize holes toaccommodate the variation in dimensions. This results in an anchoragedepending on friction and it has been found that such frictionalanchorage cannot be relied upon during shipment to prevent relativemovement between the case and the transformer.

It is the object of the present invention to provide improved means foranchoring a transformer to its case, which means does not rely uponfriction but provides a positive wedging action to prevent relativemovement between the transformer and its case, either in a vertical or ahorizontal plane.

In the accompanying drawings, which illustrate a transformer and caseembodying my invention, Figure 1 is a side view, the case being shown insection; Figure 2 is an end view, the case being shown in section;Figure 3 is a section taken on the line 3-3 of Figure 1; Figure 4 is anenlarged section taken on the line 44 of Figure 1; Figure 5 is a topplan view; Figure 6 is an enlarged section taken on the line -66 ofFigure 5; Figure 7 is an elevation of the brackets shown in Figure 6;Figure 8 is a perspective view of one end of one of the upper clampplates; and Figure 9 is a view like Figure 7 but showing a modification.

The tank or case is made of metal in rectangular form and comprises sidewalls I, end walls 2, and a bottom wall 3. The latter may be supportedon cleats 4. The transformer consists of the usual rectangular core oflaminated iron 5 and a pair of winding assemblies 6 applied to the legsthereof. The winding assemblies may be of any desired form and,therefore, not described in detail.

The laminae of the core are secured by upper and lower clamp plates 1and 8, respectively. Each of these clamp plates is formed of two channelbars held by bolts 9 passing through the webs of the bars and the endsof the core projecting beyond the winding assemblies, Secured to theclamp plates 8 by bolts ID are a pair of transverse supporting bars llformed of channel iron. Formed in the web of each of bars ll near eitherend is a hole l2 for the reception of a locating pin l3. These locatingpins are each provided with a conical point H to facilitate their entryinto holes I2 and are permanently secured to the bottom wall 3 of thetank, preferably by welding.

Permanently secured to the inner side of each channel member of theclamp plate I at either end thereof is a wedge block l5. This block hasan inclined face l6 and is so located as to allow corner ll. of theclamp plate I to project beyond the face (Figure 8). Secured to each ofthe end walls 2 of the tank is a fixed bracket l8, preferably weldedthereto. This bracket engages with a guide slot 19 in the lower edge ofa sliding bracket 20. The bracket 20 is of such width as to fit betweenthe members of the clamp plate 1 and is provided with end walls 2|, theouter sides of which engage with projecting corners ll. The front faces22 of these walls are beveled at the same angle as faces [6 of the wedgeblocks and engage with them, as best shown in Figure 6. The fixedbracket carries a bolt 23 which passes through an opening 24 in the topof the bracket 20 and is engaged by a nut 25 by means of which thebracket may be forced downwardly.

In Figure 9 I have shown a modified form of sliding bracket which isparticularly adapted for use on transformers of great width, Thisdiffers from the bracket above described only in projecting beyond thewalls 2| and engaging with two fixed brackets instead of one.

The operation of my device is as follows. The transformer, including thecore, winding assemblies, and upper and lower clamp plates has securedto the latter the supporting bars II, It is then lowered into the case,holes I2 being matched with the locating pins 13. After this, thesliding brackets 20 are placed in position between the ends of the topclamp plate I with the inclined faces 22 in engagement with faces l6 ofthe wedge blocks. The nuts 25 are now tightened, forcing the brackets 20downwardly. This pressure forces the whole transformer downwardlyagainst the bottom of the tank and at the same time locates the upperpart of the transformer properly between the end walls. Any tendency ofthe transformer to move laterally is effectively prevented by theengagement of projecting corners ll of the clamp plates with the endWalls 2| of the sliding brackets.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a device of the class described, a containing case, a transformerassembly including a core positioned in said case, a clamp platecomprising two bars separated by and extending beyond the core, a blockcarried by the inner side of each bar, each block being provided with aninclined face beyond which a corner of the bar projects, a fixed bracketcarried by a wall of the case adjacent the end ofqtheclamp plate, amovable bracket having' interlocking sliding connection with the fixedbracket and positioned between the wall of the case and the clamp plate,said movable bracket engaging with the inclined faces of the blocks andwith the projecting corners of the bars, and a threaded connectingmember extending between the fixed and movable brackets for moving themrelatively to impart a downward and transverse wedging action to thetransformer assembly.

2. In a device of the class described, a containing case, a transformerassembly including a core 20 v positioned in said case, a clamp platecomprising two bars separated by and extending beyond the core, a blockcarried by the inner side of each bar, each block being provided with aninclined face beyond which a corner of the bar projects, a fixed bracketcarried by a wall of the case adjacent the end of the clamp plate, amovable bracket having interlocking sliding connection with the fixedbracket and positioned between the wall of the case and the clamp plate,said movable bracket including top and end walls, said end wallsengaging withthe projecting corners of the bars and having inclinedfaces engaging with the inclined faces of the blocks, and a threadedmember extending between the end walls of the movable bracket andconnecting its top wall with the fixed bracket, whereby downward andtransverse wedging action may be applied to the transformer assembly.

RALPH BOERINGER.

